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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; A special kind of display that merely autosaves the game
;;
(require 'chess-game)
(chess-message-catalog 'english
'((queen-would-take . "The queen would take your knight!")
(congratulations . "Congratulations!")
(knight-1-done . "Goal: take all the pawns, without letting the queen take your knight")
(cannot-take-queen . "You cannot take the queen")))
(defun chess-tutorial-knight-1 (game ignore event &rest args)
(if (eq event 'move)
(let ((position (chess-game-pos game)))
(if (null (chess-pos-search position ?p))
(chess-message 'congratulations)
(cond
((chess-search-position position
(car (chess-pos-search position ?N)) ?q)
(let ((chess-display-handling-event nil))
(chess-game-undo game 1))
(chess-error 'queen-would-take))
((not (chess-pos-search position ?q))
(let ((chess-display-handling-event nil))
(chess-game-undo game 1))
(chess-error 'cannot-take-queen)))))))
(defun chess-tutorial ()
(interactive)
(let* (chess-default-modules
(display (chess-create-display t)))
(with-current-buffer display
(chess-module-set-leader nil)
(chess-game-set-start-position
(chess-display-game nil)
(chess-fen-to-pos "8/3p1p/2p3p/4q/2p3p/3p1p/8/N w - -"))
(chess-game-add-hook (chess-display-game nil) 'chess-tutorial-knight-1)
(setq chess-pos-always-white t)
(chess-display-popup nil)
(chess-message 'knight-1-done))))
(provide 'chess-tutorial)
;;; chess-tutorial.el ends here
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